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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "audio_player.h"
#include "bladerunner/archive.h"
#include "bladerunner/aud_stream.h"
#include "bladerunner/bladerunner.h"
#include "audio/audiostream.h"
#include "audio/mixer.h"
#include "common/debug.h"
#include "common/stream.h"
namespace Common {
class MemoryReadStream;
}
namespace BladeRunner {
AudioCache::~AudioCache() {
for (uint i = 0; i != _cacheItems.size(); ++i) {
free(_cacheItems[i].data);
}
}
bool AudioCache::canAllocate(uint32 size) {
Common::StackLock lock(_mutex);
return _maxSize - _totalSize >= size;
}
bool AudioCache::dropOldest() {
Common::StackLock lock(_mutex);
if (_cacheItems.size() == 0)
return false;
uint oldest = 0;
for (uint i = 1; i != _cacheItems.size(); ++i) {
if (_cacheItems[i].refs == 0 && _cacheItems[i].lastAccess < _cacheItems[oldest].lastAccess)
oldest = i;
}
free(_cacheItems[oldest].data);
_totalSize -= _cacheItems[oldest].size;
_cacheItems.remove_at(oldest);
return true;
}
byte *AudioCache::findByHash(int32 hash) {
Common::StackLock lock(_mutex);
for (uint i = 0; i != _cacheItems.size(); ++i) {
if (_cacheItems[i].hash == hash) {
_cacheItems[i].lastAccess = _accessCounter++;
return _cacheItems[i].data;
}
}
return NULL;
}
void AudioCache::storeByHash(int32 hash, Common::SeekableReadStream *stream) {
Common::StackLock lock(_mutex);
uint32 size = stream->size();
byte *data = (byte*)malloc(size);
stream->read(data, size);
cacheItem item = {
hash,
0,
_accessCounter++,
data,
size
};
_cacheItems.push_back(item);
_totalSize += size;
}
void AudioCache::incRef(int32 hash) {
Common::StackLock lock(_mutex);
for (uint i = 0; i != _cacheItems.size(); ++i) {
if (_cacheItems[i].hash == hash) {
_cacheItems[i].refs++;
return;
}
}
assert(0 && "AudioCache::incRef: hash not found");
}
void AudioCache::decRef(int32 hash) {
Common::StackLock lock(_mutex);
for (uint i = 0; i != _cacheItems.size(); ++i) {
if (_cacheItems[i].hash == hash) {
assert(_cacheItems[i].refs > 0);
_cacheItems[i].refs--;
return;
}
}
assert(0 && "AudioCache::decRef: hash not found");
}
AudioPlayer::AudioPlayer(BladeRunnerEngine *vm)
: _vm(vm)
{
_cache = new AudioCache();
for (int i = 0; i != 6; ++i) {
_tracks[i].hash = 0;
_tracks[i].priority = 0;
}
}
AudioPlayer::~AudioPlayer() {
delete _cache;
}
bool AudioPlayer::isTrackActive(Track *track)
{
if (!track->isMaybeActive)
return false;
return track->isMaybeActive = _vm->_mixer->isSoundHandleActive(track->soundHandle);
}
void AudioPlayer::stopAll()
{
for (int i = 0; i != TRACKS; ++i) {
_vm->_mixer->stopHandle(_tracks[i].soundHandle);
}
}
void AudioPlayer::fadeAndStopTrack(Track *track, int time)
{
(void)time;
_vm->_mixer->stopHandle(track->soundHandle);
}
int AudioPlayer::playAud(const Common::String &name, int volume, int panFrom, int panTo, int priority, byte flags) {
/* Find first available track or, alternatively, the lowest priority playing track */
int trackId = -1;
Track *track = NULL;
int lowestPriority = 100;
Track *lowestPriorityTrack = NULL;
for (int i = 0; i != 6; ++i) {
track = &_tracks[i];
if (!isTrackActive(track)) {
trackId = 1;
break;
}
if (track->priority < lowestPriority) {
lowestPriority = track->priority;
lowestPriorityTrack = track;
}
}
/* If there's no available track, stop the lowest priority track if it's lower than
* the new priority
*/
if (track == NULL && lowestPriority < priority) {
fadeAndStopTrack(lowestPriorityTrack, 1);
track = lowestPriorityTrack;
}
/* If there's still no available track, give up */
if (track == NULL)
return -1;
/* Load audio resource and store in cache. Playback will happen directly from there. */
int32 hash = mix_id(name);
if (!_cache->findByHash(hash)) {
Common::SeekableReadStream *r = _vm->getResourceStream(name);
if (!r)
return -1;
int32 size = r->size();
while (!_cache->canAllocate(size)) {
if (!_cache->dropOldest()) {
delete r;
return -1;
}
}
_cache->storeByHash(hash, r);
delete r;
}
AudStream *audStream = new AudStream(_cache, hash);
Audio::AudioStream *audioStream = audStream;
if (flags & LOOP) {
audioStream = new Audio::LoopingAudioStream(audStream, 0, DisposeAfterUse::YES);
}
Audio::SoundHandle soundHandle;
debug("PlayStream: %s", name.c_str());
int balance = panFrom;
_vm->_mixer->playStream(
Audio::Mixer::kPlainSoundType,
&soundHandle,
audioStream,
-1,
volume * 255 / 100,
balance);
track->isMaybeActive = true;
track->soundHandle = soundHandle;
track->priority = priority;
track->hash = hash;
track->volume = volume;
return trackId;
}
} // End of namespace BladeRunner
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